EP2839166B1 - Laufrad für ein kraftfahrzeuggebläse mit segmentierten nabenversteifungen - Google Patents

Laufrad für ein kraftfahrzeuggebläse mit segmentierten nabenversteifungen Download PDF

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Publication number
EP2839166B1
EP2839166B1 EP13712226.3A EP13712226A EP2839166B1 EP 2839166 B1 EP2839166 B1 EP 2839166B1 EP 13712226 A EP13712226 A EP 13712226A EP 2839166 B1 EP2839166 B1 EP 2839166B1
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EP
European Patent Office
Prior art keywords
segments
blower wheel
rib
hub
wheel according
Prior art date
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Application number
EP13712226.3A
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English (en)
French (fr)
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EP2839166A1 (de
Inventor
Denis SCOUARNEC
Antoine Levasseur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers

Definitions

  • the field of the present invention is that of the automobile, and more particularly that of the circulation of air for cooling vehicle equipment, and in particular its engine.
  • Vehicles with thermal engines need to evacuate the calories generated by their operation and they are therefore equipped with heat exchangers, in particular cooling radiators, which are placed at the front of the vehicle and which are crossed by outside air.
  • heat exchangers in particular cooling radiators, which are placed at the front of the vehicle and which are crossed by outside air.
  • a fan is placed upstream or downstream of these, the upstream or downstream being appreciated in this document with reference to the direction of flow of the air.
  • the fan has a propeller which is used to force the circulation of air; it is characterized by a high flow rate and a low pressure and has a very axially oriented flow.
  • This propeller consists of a plurality of blades which are attached, on one side to a central hub, through which passes its drive shaft, and on the other, generally to a peripheral ferrule which stiffens all of the blades.
  • This propeller is subjected to mechanical stresses due to the rotation and due to the mechanical and aerodynamic forces exerted on it.
  • the hub and / or the blades are thus liable to deform and to present several particular vibratory modes.
  • a common example of deformation is a bending of the blades in response to a harmonic of the speed of rotation of the electric drive motor.
  • a first approach consists in making the connection between the fan and the motor more flexible, so as to transmit less vibrational stresses. This solution presents problems of reducing the life of the propeller, but it also comes up against the specifications of automobile manufacturers which require, among other things, a metal connection for fixing the fan to the engine.
  • ribs having the role of setting the air movement inside said hub to cool the electric motor driving the propeller therein.
  • These ribs have an additional function in that they contribute to reinforcing the robustness of the propeller. They do not however reduce the vibratory phenomena.
  • Different solutions consisting in reducing the rigidity of the hub have been implemented, such as a curved shape given to the ribs mentioned above or the creation of radial slots in the surface of the hub, in which case the sealing character of the latter is lost. It has also been proposed to remove said ribs at the center of the hub, which however induces risks of deformation of the front face thereof, in response to the mechanical stresses of the drive shaft.
  • the document US2011 / 280729 A1 proposes, for example, a fan comprising a partial rib between the center of the hub and its periphery.
  • the aim of the present invention is to remedy these drawbacks by proposing a fan which offers greater flexibility than the prior art in terms of the connection between the drive motor and the blades, while remaining simple and economically inexpensive to produce.
  • the subject of the invention is a propeller for circulating an air flow comprising blades extending from a blade root attached to a hub of said propeller, said hub comprising a wall bottom, traversed by a passage opening of a drive shaft of said propeller, and a side wall, said hub further comprising at least one rib, located between said orifice and said side wall.
  • Said ribs have, in addition to a function of stiffening the hub, a role of setting the movement of air inside said hub, in particular for cooling the electric motor driving the propeller, provided housed in said hub.
  • said rib is formed by one or more segments, the or one of the segments having at least one free edge, extending from said bottom wall and facing towards said side wall.
  • said passage orifice is situated at the level of a boss for guiding the shaft, and the or one of said segments has at least one free edge extending from said bottom wall and facing toward said side wall, and extending from said boss.
  • said segment is not linked to said side wall of the hub.
  • each stiffener consists of non-contiguous segments.
  • the segmentation of the stiffeners, by reducing their length makes it possible to reduce the stiffness of the hub and thus, to transmit less to the propeller the stresses brought by its drive motor.
  • stiffener comprises only the two end segments
  • a hub with limited rigidity is obtained, but the central and lateral parts of which remain slightly deformable.
  • stiffener further comprises at least one additional segment
  • the stiffness of the hub can be adjusted to obtain both good mechanical strength and reduced stiffness, by modulating their number and their positioning on the diameter of the stiffener.
  • the two end segments are aligned, the said additional segment or segments being angularly offset with respect to said end segments.
  • the invention also relates to a motor vehicle fan comprising a propeller as described above, and to a motor vehicle cooling module comprising such a fan.
  • the length and positioning adopted for the various intermediate segments are then, in the case of the invention, the result of a compromise between, on the one hand, a favorable response to give the vibrational stresses and, on the other hand, the generation of a necessary setting in motion of the air internal to the hub 6.
  • Other variants are possible, relating in particular to the direction and the curvature of the stiffeners, provided that these stiffeners are segmented, and that these segments are non-contiguous. It is considered that two segments belong to the same curved stiffener when the curve which joins them does not have an inflection point.
  • the two end segments 14a and 14d are advantageous for ensuring sufficient rigidity and mechanical strength at the bottom 8 both at its connection to the central boss 13 and at that of the side wall 10.
  • the segments 14a to 14d have been shown straight and positioned in alignment with each other.
  • the invention can also be carried out with intermediate segments, straight or curved, which are not aligned with the end segments 14a and 14d.
  • Staggered alignment forms can be envisaged, the intermediate segments being positioned on either side of the main line of the stiffener 14, with an orientation parallel to that of the end segments.
  • the sum of the radial extensions of the segments of a stiffener according to the invention is between 25 and 75% of the radial extension of the stiffener, the radial extension being calculated along a radius or d 'a curve going without inflection point from the boss 13 to the side wall 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (13)

  1. Laufrad zum Bewirken der Zirkulation eines Luftstroms, welches Schaufeln (2) umfasst, die sich von einem Schaufelfuß aus erstrecken, der an einer Nabe (6) des Laufrades angebracht ist, wobei die Nabe (6) eine Rückwand (8), die von einer Öffnung (12) zur Durchführung einer Antriebswelle des Laufrades durchquert wird, und eine Seitenwand (10) umfasst, wobei die Nabe außerdem wenigstens eine Rippe (14) umfasst, die sich zwischen der Öffnung (12) und der Seitenwand (10) befindet, wobei die Rippe (14) von einem oder mehreren Segmenten (14a, 14b, 14c, 14d) gebildet wird, wobei das Segment oder eines (14a, 14b, 14c) der Segmente wenigstens einen freien Rand (15) aufweist, der sich von der Rückwand (8) aus erstreckt und der Seitenwand zugewandt ist, dadurch gekennzeichnet, dass sich die Durchführungsöffnung (12) an einem Vorsprung (13) zur Führung der Welle befindet und das Segment oder das eine (14a, 14b, 14c) der Segmente, das wenigstens einen freien Rand (15) aufweist, der sich von der Rückwand (8) aus erstreckt und der Seitenwand zugewandt ist, sich von dem Vorsprung (13) aus erstreckt.
  2. Laufrad nach Anspruch 1, wobei sich ein anderes der Segmente der Rippe von der Seitenwand (10) aus erstreckt, wobei das andere der Segmente wenigstens einen freien Rand (16) aufweist, der sich von der Rückwand (8) aus erstreckt und der Durchführungsöffnung (12) zugewandt ist.
  3. Laufrad nach einem der vorhergehenden Ansprüche, wobei sich die Segmente (14a, 14b, 14c, 14d) ein und derselben Rippe von der Rückwand (8) aus axial erstrecken.
  4. Laufrad nach einem der vorhergehenden Ansprüche, wobei sich die Segmente (14a, 14b, 14c, 14d) ein und derselben Rippe radial erstrecken.
  5. Laufrad nach einem der vorhergehenden Ansprüche, wobei alle oder einige der Segmente (14a, 14b, 14c, 14d) ein und derselben Rippe zueinander ausgerichtet sind.
  6. Laufrad nach einem der vorhergehenden Ansprüche, wobei die Segmente (14a, 14b, 14c, 14d) ein und derselben Rippe gekrümmte Segmente sind.
  7. Laufrad nach Anspruch 6, wobei alle oder einige der Segmente (14a, 14b, 14c, 14d) ein und derselben Rippe in der Verlängerung zueinander angeordnet sind.
  8. Laufrad nach einem der vorhergehenden Ansprüche, wobei die Segmente (14a, 14b, 14c, 14d) ein und derselben Rippe eine radiale Verlängerung aufweisen und die Summe der radialen Verlängerungen der Segmente zwischen 25 und 75 % der gesamten radialen Erstreckung der Rippe beträgt.
  9. Laufrad nach einem der vorhergehenden Ansprüche, wobei die Rippe aus zwei solchen Segmenten (14a, 14d) besteht.
  10. Laufrad nach einem der vorhergehenden Ansprüche, wobei die Rippe wenigstens zwei solche Segmente, Endsegmente genannt, und wenigstens ein sogenanntes zusätzliches Segment (14b, 14c), das zwischen den Endsegmenten (14a, 14d) so angeordnet ist, dass es nicht an diese Letzteren anstößt, umfasst.
  11. Laufrad nach Anspruch 10, wobei die beiden Endsegmente (14a, 14d) zueinander ausgerichtet sind, wobei das oder die zusätzlichen Segmente (14b, 14c) bezüglich der Endsegmente winkelversetzt ist bzw. sind.
  12. Kraftfahrzeuggebläse, welches ein Laufrad nach einem der vorhergehenden Ansprüche umfasst.
  13. Kraftfahrzeug-Kühlmodul, welches ein Gebläse nach dem vorhergehenden Anspruch umfasst.
EP13712226.3A 2012-04-16 2013-03-22 Laufrad für ein kraftfahrzeuggebläse mit segmentierten nabenversteifungen Active EP2839166B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1253461A FR2989435B1 (fr) 2012-04-16 2012-04-16 Helice pour ventilateur automobile a raidisseurs de moyeu segmentes
PCT/EP2013/056143 WO2013156255A1 (fr) 2012-04-16 2013-03-22 Helice pour ventilateur automobile a raidisseurs de moyeu segmentes

Publications (2)

Publication Number Publication Date
EP2839166A1 EP2839166A1 (de) 2015-02-25
EP2839166B1 true EP2839166B1 (de) 2020-07-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13712226.3A Active EP2839166B1 (de) 2012-04-16 2013-03-22 Laufrad für ein kraftfahrzeuggebläse mit segmentierten nabenversteifungen

Country Status (4)

Country Link
US (1) US9790955B2 (de)
EP (1) EP2839166B1 (de)
FR (1) FR2989435B1 (de)
WO (1) WO2013156255A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI607155B (zh) * 2016-12-02 2017-12-01 張哲朗 具有保冷模組的電扇罩體
USD860427S1 (en) 2017-09-18 2019-09-17 Horton, Inc. Ring fan
WO2020028010A1 (en) 2018-08-02 2020-02-06 Horton, Inc. Low solidity vehicle cooling fan

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5582507A (en) * 1994-09-29 1996-12-10 Valeo Thermique Moteur Automotive fan structure
EP1623122B8 (de) * 2003-04-28 2008-08-27 Robert Bosch LLC Kühllüfteranordnung für kraftwagenbrennkraftmaschine
DE102005049261B3 (de) * 2005-10-14 2007-03-29 Siemens Ag Kühlerlüfter für ein Kraftfahrzeug
JP2009250131A (ja) * 2008-04-07 2009-10-29 Mitsuba Corp 冷却装置
US8091177B2 (en) * 2010-05-13 2012-01-10 Robert Bosch Gmbh Axial-flow fan

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR2989435A1 (fr) 2013-10-18
EP2839166A1 (de) 2015-02-25
US9790955B2 (en) 2017-10-17
WO2013156255A1 (fr) 2013-10-24
US20150071787A1 (en) 2015-03-12
FR2989435B1 (fr) 2016-01-01

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